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https://www.readbyqxmd.com/read/28757139/clinical-and-epidemiological-characteristics-of-human-parainfluenza-virus-infections-of-children-in-southern-taiwan
#1
Kai-Wen Wu, Shih-Min Wang, Ching-Fen Shen, Tzong-Shiann Ho, Jen-Ren Wang, Ching-Chuan Liu
BACKGROUND: Human parainfluenza viruses (HPIV) 1-4 had been analyzed as being one of the most frequent causes of hospitalizations for young children with respiratory tract illnesses. METHODS: This retrospective study was performed from children virologically confirmed as HPIV infection through throat swab or nasopharyngeal aspirates at a tertiary care university hospital, between January 2012 and December 2014. HPIV4 was not checked and analyzed, due to not include in the commercial kit...
June 22, 2017: Journal of Microbiology, Immunology, and Infection, Wei Mian Yu Gan Ran za Zhi
https://www.readbyqxmd.com/read/28544152/a-risk-adapted-approach-to-treating-respiratory-syncytial-virus-and-human-parainfluenza-virus-in-allogeneic-stem-cell-transplantation-recipients-with-oral-ribavirin-therapy-a-pilot-study
#2
José Luis Piñana, Juan Carlos Hernández-Boluda, Marisa Calabuig, Isabel Ballester, Manuela Marín, Silvia Madrid, Anabel Teruel, María-José Terol, David Navarro, Carlos Solano
Here we report the applicability of a protocol based on clinical conditions and risk factors (RFs) for managing 35 allogeneic hematopoietic stem cell transplantation (allo-HSCT) recipients who developed a total of 52 episodes of respiratory viral infections (RVIs) caused by respiratory syncytial virus (RSV; n=19), human parainfluenza virus (HPIV; n=29), or both (n=4) over a 2-year study period. Risk categories were classified as high risk (cat-1) when the immunodeficiency scoring index was ≥3 and/or ≥3 RFs and/or ≥1 co-infective virus(es) were present; the remaining cases were classified as low risk (cat-0)...
August 2017: Transplant Infectious Disease: An Official Journal of the Transplantation Society
https://www.readbyqxmd.com/read/28466381/tetherin-antagonism-by-v-proteins-is-a-common-trait-among-the-genus-rubulavirus
#3
Keisuke Ohta, Yusuke Matsumoto, Morihiro Ito, Machiko Nishio
Tetherin (BST-2/CD317/HM1.24) is an anti-viral factor that restricts the budding of several enveloped viruses. Most of these viruses have evolved to encode tetherin antagonists. Our previous study demonstrated that the growth of human parainfluenza virus type 2 (hPIV-2), a member of the genus Rubulavirus in the family Paramyxoviridae, was inhibited by tetherin, and its V protein decreases the amount of cell surface tetherin by the interaction. In the present study, we investigated whether tetherin inhibits the growth of other rubulaviruses including PIV-5, mumps virus (MuV), simian virus 41, and hPIV-4, and whether their V proteins act as tetherin antagonists...
August 2017: Medical Microbiology and Immunology
https://www.readbyqxmd.com/read/28455649/human-parainfluenza-virus-type-2%C3%A2-v-protein-inhibits-induction-of-tetherin
#4
Keisuke Ohta, Yusuke Matsumoto, Natsuko Yumine, Machiko Nishio
Tetherin is an anti-viral factor that restricts viral budding through tethering virions to the cell surface. The human parainfluenza virus type 2 (hPIV-2) V protein decreases cell surface tetherin in HeLa cells, which constitutively express endogenous tetherin. However, the role of the hPIV-2 V protein in tetherin induction remains unclear. Here, we examined whether hPIV-2 infection itself induces tetherin in HEK293 cells that have no basal expression of tetherin. Unlike influenza A virus (IAV) infection, hPIV-2 infection induced neither tetherin mRNA nor protein expression...
August 2017: Medical Microbiology and Immunology
https://www.readbyqxmd.com/read/28182741/etiology-of-severe-pneumonia-in-ecuadorian-children
#5
Sivani Jonnalagadda, Oswaldo Rodríguez, Bertha Estrella, Lora L Sabin, Fernando Sempértegui, Davidson H Hamer
BACKGROUND: In Latin America, community-acquired pneumonia remains a major cause of morbidity and mortality among children. Few studies have examined the etiology of pneumonia in Ecuador. METHODS: This observational study was part of a randomized, double blind, placebo-controlled clinical trial conducted among children aged 2-59 months with severe pneumonia in Quito, Ecuador. Nasopharyngeal and blood samples were tested for bacterial and viral etiology by polymerase chain reaction...
2017: PloS One
https://www.readbyqxmd.com/read/28102432/synthesis-of-human-parainfluenza-virus-4-nucleocapsid-like-particles-in-yeast-and-their-use-for-detection-of-virus-specific-antibodies-in-human-serum
#6
Aistė Bulavaitė, Rita Lasickienė, Paulius Lukas Tamošiūnas, Martynas Simanavičius, Kęstutis Sasnauskas, Aurelija Žvirblienė
The aim of this study was to produce human parainfluenza virus type 4 (HPIV4) nucleocapsid (N) protein in yeast Saccharomyces cerevisiae expression system, to explore its structural and antigenic properties and to evaluate its applicability in serology. The use of an optimized gene encoding HPIV4 N protein amino acid (aa) sequence GenBank AGU90031.1 allowed high yield of recombinant N protein forming nucleocapsid-like particles (NLPs) in yeast. A substitution L332D disrupted self-assembly of NLPs, confirming the role of this position in the N proteins of Paramyxovirinae...
April 2017: Applied Microbiology and Biotechnology
https://www.readbyqxmd.com/read/28095926/epidemiology-of-parainfluenza-infection-in-england-and-wales-1998-2013-any-evidence-of-change
#7
H Zhao, R J Harris, J Ellis, M Donati, R G Pebody
Human parainfluenza virus (HPIV) infections are one of the commonest causes of upper and lower respiratory tract infections. In order to determine if there have been any recent changes in HPIV epidemiology in England and Wales, laboratory surveillance data between 1998 and 2013 were analysed. The UK national laboratory surveillance database, LabBase, and the newly established laboratory-based virological surveillance system, the Respiratory DataMart System (RDMS), were used. Descriptive analysis was performed to examine the distribution of cases by year, age, sex and serotype, and to examine the overall temporal trend using the χ 2 test...
April 2017: Epidemiology and Infection
https://www.readbyqxmd.com/read/27692559/human-parainfluenza-virus-3-can-be-targeted-by-rapidly-ex-vivo-expanded-t-lymphocytes
#8
Lauren P McLaughlin, Haili Lang, Elizabeth Williams, Kaylor E Wright, Allison Powell, Conrad R Cruz, Anamaris M Colberg-Poley, Cecilia Barese, Patrick J Hanley, Catherine M Bollard, Michael D Keller
BACKGROUND AIMS: Human parainfluenza virus-3 (HPIV) is a common cause of respiratory infection in immunocompromised patients and currently has no effective therapies. Virus-specific T-cell therapy has been successful for the treatment or prevention of viral infections in immunocompromised patients but requires determination of T-cell antigens on targeted viruses. METHODS: HPIV3-specific T cells were expanded from peripheral blood of healthy donors using a rapid generation protocol targeting four HPIV3 proteins...
December 2016: Cytotherapy
https://www.readbyqxmd.com/read/27514690/use-of-laboratory-and-administrative-data-to-understand-the-potential-impact-of-human-parainfluenza-virus-4-on-cases-of-bronchiolitis-croup-and-pneumonia-in-alberta-canada
#9
Sumana Fathima, Kimberley Simmonds, Jesse Invik, Allison N Scott, Steven Drews
BACKGROUND: Human Parainfluenza Virus (hPIV) causes severe respiratory illness in infants and adults. Our study describes the association of hPIV1-4 with bronchiolitis, croup, and pneumonia using retrospective laboratory, administrative and public health data. Due to issues including the historic lack of hPIV4 in some commercial respiratory virus panels, the description of the impact of hPIV4 on croup, bronchiolitis, and pneumonia at population levels has often been limited. This study will use routine clinical laboratory data, and administrative data to provide a preliminary description of the impact of hPIV4 on these diseases in our population...
August 11, 2016: BMC Infectious Diseases
https://www.readbyqxmd.com/read/27512058/graf1-controls-the-growth-of-human-parainfluenza-virus-type-2-through-inactivation-of-rhoa-signaling
#10
Keisuke Ohta, Hideo Goto, Yusuke Matsumoto, Natsuko Yumine, Masato Tsurudome, Machiko Nishio
UNLABELLED: Rho GTPases are involved in a variety of cellular activities and are regulated by guanine nucleotide exchange factors and GTPase-activating proteins (GAPs). We found that the activation of Rho GTPases by lysophosphatidic acid promotes the growth of human parainfluenza virus type 2 (hPIV-2). Furthermore, hPIV-2 infection causes activation of RhoA, a Rho GTPase. We hypothesized that Graf1 (also known as ARHGAP26), a GAP, regulates hPIV-2 growth by controlling RhoA signaling...
October 15, 2016: Journal of Virology
https://www.readbyqxmd.com/read/27267595/evaluation-of-custom-multiplex-real-time-rt-pcr-in-comparison-to-fast-track-diagnostics-respiratory-21-pathogens-kit-for-detection-of-multiple-respiratory-viruses
#11
COMPARATIVE STUDY
Bharti Malhotra, M Anjaneya Swamy, P V Janardhan Reddy, Neeraj Kumar, Jitendra Kumar Tiwari
BACKGROUND: Severe acute respiratory infections in children can be fatal, rapid identification of the causative agent and timely treatment can be life saving. Multiplex real time RT-PCR helps in simultaneous detection of multiple viruses saving cost, time and labour. Commercially available multiplex real time RT-PCR kits are very expensive. Therefore the aim of the present study was to develop a cost effective multiplex real time RT-PCR for the detection of 18 respiratory viruses and compare it with an in-vitro diagnostics approved Fast Track Diagnostic Respiratory Pathogens 21 Kit (FTD)...
June 6, 2016: Virology Journal
https://www.readbyqxmd.com/read/27197630/human-parainfluenza-virus-types-1-4-in-hospitalized-children-with-acute-lower-respiratory-infections-in-china
#12
Ni-Guang Xiao, Zhao-Jun Duan, Zhi-Ping Xie, Li-Li Zhong, Sai-Zhen Zeng, Han Huang, Han-Chun Gao, Bing Zhang
Human parainfluenza viruses (HPIVs) are an important cause of acute lower respiratory tract infections (ALRTIs). HPIV-4, a newly identified virus, has been associated with severe ALRTIs recently. A total of 771 nasopharyngeal aspirate samples were collected from hospitalized children between March 2010 and February 2011. HPIVs were detected by Nest-PCR, and other known respiratory viruses were detected by RT-PCR and PCR. All amplification products were sequenced. HPIVs were detected in 151 (19.58%) patients, of whom 28 (3...
December 2016: Journal of Medical Virology
https://www.readbyqxmd.com/read/27173651/distribution-and-trends-of-human-parainfluenza-viruses-in-hospitalised-children
#13
M Anjaneya Swamy, Bharti Malhotra, P V Janardhan Reddy, Neeraj Kumar, Jitendra Kumar Tiwari, M L Gupta
OBJECTIVE: To study the distribution of Human Parainfluenza viruses (HPIV) 1-4 and their trends in children ≤5 y of age, hospitalised at a tertiary care centre, Jaipur and co-infection with other respiratory viruses. METHODS: Nasopharyngeal aspirate and throat swabs were collected and processed for extraction of nucleic acid using automated extraction system and real time RT-PCR was performed using primers and probes specific to HPIV 1-4 and other respiratory viruses on 743 samples...
October 2016: Indian Journal of Pediatrics
https://www.readbyqxmd.com/read/27012372/viral-etiology-of-severe-acute-respiratory-infections-in-hospitalized-children-in-cameroon-2011-2013
#14
Sebastien Kenmoe, Patrice Tchendjou, Marie-Astrid Vernet, Suzie Moyo-Tetang, Tatiana Mossus, Mohamadou Njankouo-Ripa, Angeladine Kenne, Véronique Penlap Beng, Astrid Vabret, Richard Njouom
BACKGROUND: Severe acute respiratory illness (SARI) is recognized as an important cause of morbidity, mortality, and hospitalization among children in developing countries. Little is known, however, in tropical countries like Cameroon about the cause and seasonality of respiratory infections, especially in hospitalized settings. OBJECTIVES: Our study investigates the viral etiology and seasonality of SARI in hospitalized children in Yaounde, Cameroon. METHODS: Prospective clinic surveillance was conducted to identify hospitalized children aged ≤15 years presenting with respiratory symptoms ≤5-day duration...
September 2016: Influenza and Other Respiratory Viruses
https://www.readbyqxmd.com/read/26957245/-analysis-of-pathogenic-features-and-infection-status-of-human-parainfluenza-virus-type-3-among-children-in-hangzhou
#15
Xin Qian, Xinfeng Yu, Min Zhao, Yu Kou, Jun Li, Yinyan Zhou
OBJECTIVE: To determine the level of genetic variation of human parainfluenza virus type 3 (HPIV-3), and to describe infection and co-infection characteristics of HPIV-3 in children. METHODS: Single respiratory samples from 856 pediatric patients with acute respiratory tract infection (ARI) in Hangzhou were collected from December 2009 to March 2013. All samples were screened for HPIV-3 by real-time RT-PCR and followed by HN sequencing and phylogenetic analysis...
March 2016: Zhonghua Yu Fang Yi Xue za Zhi [Chinese Journal of Preventive Medicine]
https://www.readbyqxmd.com/read/26675672/human-parainfluenza-virus-type-2-v-protein-inhibits-and-antagonizes-tetherin
#16
K Ohta, H Goto, N Yumine, M Nishio
Tetherin (BST-2/CD317/HM1.24) is an antiviral membrane protein that prevents the release of enveloped viruses from the cell surface. We found that the growth of human parainfluenza virus type 2 (hPIV-2), but not that of V protein-deficient recombinant hPIV-2, was inhibited by tetherin. V protein immunoprecipitates with tetherin, and this interaction requires its C-terminal Trp residues. The glycosyl phosphatidylinositol attachment signal of tetherin, but not its cytoplasmic tail, was necessary for its binding with V...
March 2016: Journal of General Virology
https://www.readbyqxmd.com/read/26658594/isolation-molecular-characterization-of-human-parainfluenza-virus-in-chennai-india
#17
C P Indumathi, P Gunanasekaran, K Kaveri, Kavita Arunagiri, S Mohana, A Khaleefathullah Sheriff, B V SureshBabu, P Padmapriya, R Senthilraja, Gracy Fathima
BACKGROUND & OBJECTIVES: Human parainfluenza virus (HPIV) accounts for a significant proportion of lower respiratory tract infections in children as well as adults. This study was done to detect the presence of different subtypes of HPIV from patients having influenza like illness (ILI). METHODS: Throat and nasal swabs from 232 patients with ILI who were negative for influenza viruses were tested by multiplex reverse transcription polymerase chain reaction(mRT-PCR) for the detection of human parainfluenza virus...
November 2015: Indian Journal of Medical Research
https://www.readbyqxmd.com/read/26563893/the-clinical-usefulness-of-lymphocyte-monocyte-ratios-in-differentiating-influenza-from-viral-non-influenza-like-illnesses-in-hospitalized-adults-during-the-2015-influenza-a-h3n2-epidemic-the-uniqueness-of-hpiv-3-mimicking-influenza-a
#18
B A Cunha, J J Connolly, N Irshad
During influenza epidemics, influenza-like illnesses (ILIs) viruses cocirculate with influenza strains. If positive, rapid influenza diagnostic tests (RIDTs) identify influenza A/B, but false-negative RIDTs require retesting by viral polymerase chain reaction (PCR). Patient volume limits testing during influenza epidemics, and non-specific laboratory findings have been used for presumptive diagnosis pending definitive viral testing. In adults, the most useful laboratory abnormalities in influenza include relative lymphopenia, monocytosis, and thrombocytopenia...
January 2016: European Journal of Clinical Microbiology & Infectious Diseases
https://www.readbyqxmd.com/read/26557031/problem-of-immunoglobulin-m-co-detection-in-serological-response-to-bacterial-and-viral-respiratory-pathogens-among-children-suspected-of-legionellosis
#19
Katarzyna Wanda Pancer
The objective of this research was an analysis of the serological response to respiratory bacterial and viral pathogens, in 156 children admitted to hospital in Warsaw with a suspicion of legionellosis. Levels of immunoglobulin (Ig) M to Bordetella pertussis, Mycoplasma pneumoniae, respiratory syncytial virus (RSV), adenoviruses, human parainfluenza virus (HPIV) t. 1-4 and influenza t. A + B viruses were determined retrospectively by ELISAs. In the prospective examinations (only Legionella pneumophila sg1), a positive level of IgM was found in 35 patients, but in 59 children together with retrospective tests...
2015: Central-European Journal of Immunology
https://www.readbyqxmd.com/read/26235585/rapid-fluorescent-detection-assay-for-human-parainfluenza-viruses
#20
Tadanobu Takahashi, Maiko Takano, Yuuki Kurebayashi, Takashi Agarikuchi, Chihiro Suzuki, Keijo Fukushima, Shunsaku Takahashi, Tadamune Otsubo, Kiyoshi Ikeda, Akira Minami, Takashi Suzuki
Human parainfluenza virus type 1 (hPIV1) does not form clear plaque by the conventional plaque formation assay because of slightly a cytopathic effects in many cell lines infected with hPIV1, thus making in virus titration, isolation and inhibitor evaluation difficult. We have succeeded in fluorescent histochemical visualization of sialidase activities of influenza A and B viruses, Newcastle disease virus and Sendai virus by using a novel fluorescent sialidase substrate, 2-(benzothiazol-2-yl)-4-bromophenyl 5-acetamido-3,5-dideoxy-α-D-glycero-D-galacto-2-nonulopyranosidonic acid (BTP3-Neu5Ac)...
2015: Biological & Pharmaceutical Bulletin
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